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Weil McLain HE II air flow not proven

Floyd_41 Member Posts: 1
the blower has a little flapper at the top just where the vent pipe hooks on.... you can see the little wire handle that sticks out the side. If the handle is stuck then the flapper is probably stuck in the closed position. Wd- 40 will work or just cut the thing off, as it really doesn't serve a useful purpose, other than to give people fits....



  • Tom Hopkins
    Tom Hopkins Member Posts: 554
    W M HE 2 air flow not proven error code

    My HE II boiler has won't go past the Purge stage and quits after about 5 minutes with an "air flow not proven" trouble code.

    The blower is running normally as far as I can tell and there doesn't seem to be any obstruction in the exhaust duct. So, I replaced the air pressure switch but with no change in the problem.

    Is there something else I can check?
  • mwsmith
    mwsmith Member Posts: 10

    Check the phone book ..

    Look under " Heating Contractor "
  • Hvacman
    Hvacman Member Posts: 159

    Condensate, an over abundance of same...
  • Jim Farrell
    Jim Farrell Member Posts: 46
    Weil-Mclain HE 2

    Do not cut anything off...

    Call a heating contractor in your area and ask him if does troubleshooting of gas fired boilers...Second question to ask him is if he has a manometer...if the answer to either question is no or you don't need that stuff or something like that keep calling till you get to a heating contractor which knows how to trouble shoot problems like this...

    This is not a job that can be fixed by a homeowner...Where do you live maybe I can reccommend someone in your area...

    Trust me only pay once to have this problem fixed...

    There is a reason why the pressure switch flashed this error...It could be in the vent pipe, blower assembly or pressure switch....Rare chance it could be in the delivery pressure of your gas service...Do you have LP or Natural???
    Or it could be in the control board...Save yourself some money get someone once and get it fixed right the first time...

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